Check on the last frost date where you are. If the weather has evened out and it is past your last frost date, there is no reason you cannot plant the rosebush outside. Here is a link to an article for you on planting rosebushes : https://www.gardeningknowhow.com/ornamental/flowers/roses/planting-rose-bushes.htm
Answered on May 14, 2014
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